a. Default sets the scale to the measurement range.
b. Auto automatically adjusts the scale to appropriately fit the line currently shown on the screen.
c. Manual allows you to configure the scale either as High and Low values or as a Span around a Center
value. For example, a scale from a Low of 0 V to a High of 5 V is equivalent to a Center of 2.5 V and a
Span of 5 V.
d. Limits set the scale to the alarm limits. Note that this softkey is only available when you configure alarm
on the selected channel by pressing the [Alarm] key on the front panel.
Press Autoscale Once softkey to automatically scale the trend chart's vertical axis one time based on the
scanned memory readings shown on the screen. This also sets the vertical scale mode to Manual.
Histogram
The histogram shows measurement data as a graphical representation of the distribution of measurement
data. Data is grouped in bins represented by vertical bars in the histogram display.
The Statistics softkey behave as in Number display.
Press the Cursors softkey to display the histogram cursors. Cursors in the histogram are specified as bin
numbers and display the range of values covered by those bins, the count and the percentage of the total.
The total count and percentage of total, as well as the measurement range covered, between the cursor
bins, are also displayed.
In the graphic below, cursor B1 (violet vertical lines) is positioned on bin number 30 and cursor B2 (green
vertical lines) is positioned on bin number 50 (bin number shown above the B2 softkey). The bin inform-
Keysight DAQ970A User's Guide 73
3 Features and Functions
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